CN107469550A - A kind of integrated condensing and the VOCs emission control systems and its processing method of absorption - Google Patents
A kind of integrated condensing and the VOCs emission control systems and its processing method of absorption Download PDFInfo
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- CN107469550A CN107469550A CN201710724356.3A CN201710724356A CN107469550A CN 107469550 A CN107469550 A CN 107469550A CN 201710724356 A CN201710724356 A CN 201710724356A CN 107469550 A CN107469550 A CN 107469550A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0462—Temperature swing adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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Abstract
The invention discloses a kind of integrated condensing and the VOCs emission control systems and its processing method of absorption.Its system includes：Primary heat exchange system, and the condenser system and adsorption system being connected with primary heat exchange system successively pipeline, condenser system include ice chest and refrigeration unit, and refrigeration unit forms refrigerating circuit by refrigeration piping and ice chest, and ice chest accesses adsorption system by pipeline；Adsorption system includes the adsorption tanks and cooling tube of built-in active carbon bed, and cooling tube one end is connected with liquid state organics feed-line, and the other end is connected with knockout drum.Its processing method is as follows：Oil gas is passed through ice chest, condensation liquefaction, liquefaction organic matter enters knockout drum, on-condensible gas goes adsorption system, adsorption-desorption gas enters knockout drum, low temperature liquid organic matter in knockout drum, returned liquid pump pressurization and be sent into the cooling tube of adsorption tanks, the liquid state organics for leaving cooling tube remove storage tank.The present invention is simple in construction, and easy to operate, more environmentally friendly and purified treatment effect is good.
Description
Technical field
The invention belongs to petroleum vapor recovery and VOCs Treatment process field, and in particular to a kind of integrated condensing and the VOCs of absorption
Emission control systems and its processing method.
Background technology
Volatile organic matter（VOCs）Refer to that saturated vapour pressure is more than 70Pa at normal temperatures, under normal pressure boiling point 260 DEG C with
Interior organic matter, including the organic matter such as hydro carbons, oxygen hydro carbons, sulphur hydro carbons and halohydrocarbon, common VOCs Treatment process include cold
Solidifying two kinds of method and absorption method.
Condensation method is the property for having at different temperatures and pressures using different organic matters different saturated vapor pressures, is used
The mode of system temperature is reduced, the method for making gaseous component liquefy and being separated from air.Condensation method will to discharge index
Control is asked to 10-6Magnitude（Volume fraction）When, because that need to be reduced to extremely low temperature, operating cost is high.Condensation method has following aobvious
Work feature：1. small by ambient temperature, pressure influence, recovering effect is stable, especially suitable for high temperature, high humidity, high concentration occasion；
2. operating temperature is less than VOCs each component flash-points, security is good；3. technological process is short, device volume is small, for ease of maintenaince and operates；
4. when discharge index is harsher, system energy consumption is big, cost of investment is high, and the front end suitable for high concentrations of gas pre-processes.
Absorption method is to utilize the difference of adhesion power between each component and adsorbent in VOCs- air mixtures, makes to have
Machine component separates with constituent of air.Easily adsorbed organic component is fixed on adsorbent bed, is not easy adsorbed constituent of air,
It is discharged into air.The organic component being adsorbed by adsorbent is desorbed out by the mode such as depressurizing, heating, and into condensation or inhales
Receiving apparatus liquefaction recovery.Absorption method has following distinguishing feature：1. the VOCs rate of recovery is high, discharge gas concentration can be effectively controlled, one
As be used for emission control end-o f-pipe -control；2. the organic component being desorbed can not be reclaimed directly, it need to condense or the secondary place such as absorb
Reason；3. adsorption process is exothermic process, when handling the VOCs of high concentration, easily because higher heat of adsorption produces unsafe factor.
Condensation plus the group technology of absorption, can both utilize be condensate in high temperature, high humidity, high concentration region it is efficient, again can be with
Using adsorbing in the efficient of low concentration, the discharge index for reaching strict had both been can guarantee that, and can farthest reclaims petroleum resources,
It is to apply wide integrated VOCs emission control techniques at present.Application number CN200810253616 Chinese patent application discloses
A kind of integrated approach of oil gas reclaiming device for gas station and its condensation adsorption, was mainly adsorbed using condensation process, once
Journey, filter out air and return buried tank.It is even lower typically at -30 DEG C but condensation method ice chest temperature is relatively low, come from
The condensate temperature of ice chest is also very low, it is minimum can be to less than -20 DEG C, it is contemplated that caused by sale and cold liquid long distance delivery possibility
Ice blocks up, and need to carry out cold recovery to condensate liquid.
On the other hand, charcoal absorption is the current widely used adsorption technology in petroleum vapor recovery field, by having containing VOCs
Machine waste gas is by active carbon bed, and VOCs therein is adsorbed to be absorbed, and purified gas is discharged into air.But in processing ketone, aldehyde etc. easily
During the solvent of oxidation, such VOCs can react with activated carbon or in activated carbon surface, by the accumulation of the heat of oxidation, heat up,
Due also to the additional catalyst effect of activated carbon, and cause the too high accident caught fire or even exploded of activated carbon local temperature.In activity
In charcoal bed, air rising is accelerated due to the oxidation of bed, the temperature on top just gradually rises.Due to temperatures decrease oxygen
Speed is faster, therefore bed is higher, and its accumulation of heat, the danger caught fire are bigger.It is at present, notable for adsorbent bed temperature rise,
The problem of even hot-spot is caught fire, causes risky operation situation is not fundamentally improved.
If the cold recovery of the cooling of active carbon bed and condensate liquid can be combined, the wasting of resources can be reduced
While also assures that safety in production.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of integrated condensing and the VOCs of absorption discharges
Control system and its processing method, using low-temperature receiver in system, the system and its processing method to be cooled to active carbon bed can
Be widely used in significant, high concentration the VOCs of the heat of adsorption recovery of resource component and emission control, reduce the wasting of resources and
Atmosphere pollution.
The present invention solves the technical scheme that its technical problem uses：
A kind of integrated condensing and the VOCs emission control systems of absorption, including primary heat exchange system, and with primary heat exchange system
The condenser system and adsorption system of pipeline connection successively, the primary heat exchange system and condenser system also access gas-liquid by pipeline
Knockout drum, the condenser system include ice chest and refrigeration unit, and the refrigeration unit is formed by refrigeration piping and ice chest and freezed
Loop, the ice chest top or top sidewall are provided with gas vent, and the gas vent accesses adsorption system by pipeline, described
The cooling device that adsorption system includes the adsorption tanks of built-in active carbon bed and cooled to active carbon bed, the cooling
Device uses cooling tube, and cooling tube one end is connected by pipeline with knockout drum, the other end and liquid state organics feed-line
Connection, the liquid state organics feed-line front end are knockout drum, and the knockout drum also passes through vavuum pump and absorption
Tank pipeline connects.
As a kind of optimal technical scheme of the application, the cooling tube is that two dimensional surface cooling tube or three-dimensional spiral cool down
Coil pipe, directly contacted with active carbon bed in adsorption tanks；Cooling tube is smooth pipe, screwed pipe or finned tube.
Further, the cooling tube material is any one or more of carbon steel, stainless steel, copper or aluminium.
As a kind of optimal technical scheme of the application, the adsorption system packet is set, and every group is provided with adsorption-desorption and hands over
For two adsorption tanks of operation.
As a kind of optimal technical scheme of the application, the absorption pot bottom is equipped with adsorption tanks inlet valve, Vacuum solutions
Valve is inhaled, top is equipped with adsorption tanks outlet valve, adsorption tanks outlet valve access waste gas discharge drum in parallel.
As a kind of optimal technical scheme of the application, the adsorption tanks are also connected with assisted desorption system pipeline, described
Heat transferring medium used is any one of nitrogen or vapor in assisted desorption system.
As a kind of optimal technical scheme of the application, the primary heat exchange system is that primary air-cooled heat exchanger or lime set are received
Collect tank.
As a kind of optimal technical scheme of the application, liquid pump is provided with back after the knockout drum, return liquid pump respectively with
Adsorption tanks, the connection of liquid state organics feed-line.
As a kind of optimal technical scheme of the application, fluid level transmitter, the suction are additionally provided with the knockout drum
Temperature transmitter is additionally provided with attached tank, the vavuum pump is dry vacuum pump.
The processing method of a kind of integrated condensing and the VOCs emission control systems of absorption, comprises the following steps：
（1）Oil gas enters primary heat exchange system through pipeline, enters condenser system after pre- recovery in primary heat exchange system, is condensing
Realize that partial organic substances liquefy in system, liquid phase stores into knockout drum, and gas phase enters adsorption system；
（2）Active carbon bed adsorbs organic matter, and the low temperature organic liquid in knockout drum enters cooling coil by pipeline, right
Adsorption bed is cooled in adsorption tanks；When active carbon bed is close to saturation, cooling coil valve is closed, adsorption tanks are by adsorbing
State switchs to detachment status, vacuum pump startup, the active carbon bed in adsorption tanks is desorbed；
（3）After desorption, VOCs enters knockout drum, wherein easily solidifying component enters gas-liquid separation tank bottom and forms liquid layer, fixed gas
Body accesses condenser system through pipeline, carries out condensation process again.
Compared with prior art, the VOCs emission control systems and its processing side of integrated condensing provided by the invention and absorption
Method, have the advantages that：
（1）The present invention goes cooling to be heated up active-carbon bed because heat of adsorption exists using the low temperature liquid organic matter condensed out
Layer, on the premise of the safe and stable operation of adsorption tanks is ensured, realizes the cold recovery of low temperature liquid organic matter；
（2）System provided by the invention is first condensed before absorption, can mitigate the burden in adsorption process, extends adsorbent
Service life, using temp.-changing adsorption process, be also different from conventional pressure-variable adsorption process；
（3）For system provided by the invention after adsorption/desorption, organic gas is not also liquefied, will be again introduced at condenser system
Reason, loop is formed, improve the purifying rate of organic exhaust gas.
Brief description of the drawings
Fig. 1 is a kind of integrated condensing of the present invention and the VOCs emission control systems schematic flow sheets of absorption；
Fig. 2 is lime set knockout drum external interface schematic diagram of the present invention；
Fig. 3 is knockout drum external interface schematic diagram of the present invention：
Fig. 4 is ice chest external interface schematic diagram of the present invention；
Fig. 5 is adsorption tanks external interface schematic diagram of the present invention；
Fig. 6 is 4 kinds of forms of cooling tube of the present invention.
Wherein, 1- lime sets collecting tank；1a- gas feeds；1b- gas vents；1c- liquid discharge outlets；2- knockout drums；
2a- lime set collecting tanks liquid inlet；2b- ice chest condensate inlets；2c- gas vents；2d- stripping gas imports；2e- liquid level gauges connect
Mouthful；2f- interface of the level gauge；2g- liquid outlets；3- fluid level transmitters；4- blower fans；5- ice chests；5a- gas feeds；5b- gases go out
Mouthful；5c- refrigerant imports；5d- refrigerant exits；5e- condensate discharge mouths；6- refrigeration units；7- adsorption tanks inlet valves；8- adsorption tanks
Inlet valve；9- adsorption tanks；9a- gas feeds；9b- gas vents；9c- cold liquid inlets；9d- cold liquid outlets；9e- temperature transmitters
Interface；9f- temperature transmitter interfaces；9g- temperature transmitter interfaces；9h- tap holes；10- adsorption tanks；10a- gas feeds；
10b- gas vents；10c- cold liquid inlets；10d- cold liquid outlets；10e- temperature transmitter interfaces；10f- temperature transmitter interfaces；
10g- temperature transmitter interfaces；10h- tap holes；11- oil gas collection pipelines；12- assist medium pipelines；13- liquid state organics are defeated
Send pipeline；Cold liquid temperature transmitter after 14- heat exchange；15- emergency blow-down valves；16- discharge drums；17- adsorption tanks outlet valves；18- inhales
Attached tank outlet valve；19- adsorption tanks equalizer valves；20- adsorption tanks equalizer valves；21- gas stripping gas inlet valves；22- gas stripping gas inlet valves；
23- cold liquid inlet valves；24- cold liquid inlet valves；25- cooling coils；26- cooling coils；27- active carbon beds；28- is active-carbon bed
Layer；29- adsorption tanks tap holes；30- adsorption tanks tap holes；31- vacuum desorption valves；32- vacuum desorption valves；33- dry vacuum pumps；
34- returns liquid pump；The cold liquid temperature transmitters of 35-.
Embodiment
For the technical characteristic to the present invention, purpose and effect are more clearly understood, with reference to Figure of description
And specific embodiment, the present invention is furture elucidated.
Embodiment 1：
A kind of integrated condensing and the VOCs emission control systems of absorption, including primary heat exchange system, and with primary heat exchange system
The condenser system and adsorption system of pipeline connection, concrete structure are as follows successively：
With reference to figure 1 and Fig. 2, primary heat exchange system provided by the invention is lime set collecting tank 1, lime set collecting tank 1 and oil gas collection
Pipeline 11 connects, and lime set collecting tank 1 includes three openings：Gas feed 1a, gas vent 1b and liquid discharge outlet 1c.Wherein gas
Body import 1a is connected with oil gas collection pipeline 11, and the gas vent 1b positioned at the top of lime set collecting tank 1 is connected with the pipeline of blower fan 4,
Liquid discharge outlet 1c is located at the bottom of lime set collecting tank 1, is connected by pipeline with knockout drum 2.
With reference to figure 1 and Fig. 3, the knockout drum 2 includes seven openings：Lime set collecting tank liquid inlet 2a, ice chest are cold
Lime set entrance 2b, gas vent 2c, stripping gas import 2d, interface of the level gauge 2e, interface of the level gauge 2f and liquid outlet 2g.Gas-liquid
Fluid level transmitter 3 is provided with knockout drum 2, for monitoring liquid level in knockout drum 2.The fluid level transmitter 3 passes through liquid level
Meter interface 2e and interface of the level gauge 2f is connected with knockout drum 2, and liquid discharge is connect on the lime set collecting tank liquid inlet 2a
Mouth 1c, gas vent 2c pass through pipeline and access blower fan 4.
With reference to figure 1 and Fig. 4, the condenser system includes ice chest 5 and refrigeration unit 6, and the ice chest 5 includes five openings：
Gas feed 5a, gas vent 5b, refrigerant import 5c, refrigerant exit 5d and it is connected with ice chest condensate inlet 2b pipelines cold
Lime set floss hole 5e.Ice chest is shell-and-tube heat exchanger or plate type heat exchanger, and gas side is hot side, and medium side is cold side, if cold
Case is shell-and-tube heat exchanger, then gas walks shell side, and refrigerant walks tube side.Given a dinner for a visitor from afar on gas feed 5a machine 4, gas vent 5b passes through pipe
Road with and valve access adsorption tanks, refrigeration unit 6 pass through pipeline and refrigerant import 5c, refrigerant exit 5d formation refrigerating circuit.
With reference to figure 1 and Fig. 5, in the present embodiment, the adsorption system uses double adsorption tanks of adsorption-desorption alternate run,
Respectively adsorption tanks 9 and adsorption tanks 10, two adsorption tanks front-end pipelines access ice chest 5 in parallel, bottom is connected to together after being connected
Knockout drum 2, top, which links together, is connected to discharge drum 16；Specifically, adsorption tanks 9 and the bottom of adsorption tanks 10 are respectively equipped with
Adsorption tanks inlet valve 7, adsorption tanks inlet valve 8, vacuum desorption valve 31, vacuum desorption valve 32, top are respectively equipped with adsorption tanks outlet
Valve 17, adsorption tanks outlet valve 18, adsorption tanks equalizer valve 19, adsorption tanks equalizer valve 20.Wherein adsorption tanks inlet valve 7 and adsorption tanks enter
The gas vent 5b of the access ice chest 5 in parallel of mouth valve 8, vacuum desorption valve 31, vacuum desorption valve 32 access dry vacuum pump 33 in parallel
It is connected again with knockout drum 2, adsorption tanks outlet valve 17, adsorption tanks outlet valve 18 access waste gas discharge drum 16 in parallel, adsorption tanks
Equalizer valve 19, adsorption tanks equalizer valve 20 positioned at adsorption tanks 9, the top of adsorption tanks 10, make adsorption tanks after desorption by vacuum respectively
State is recovered to atmospheric pressure state.
Adsorption tanks 9 include eight external interfaces：Gas feed 9a, gas vent 9b, cold liquid inlet 9c, cold liquid outlet 9d,
Temperature transmitter interface 9e, temperature transmitter interface 9f, temperature transmitter interface 9g and the tap hole for being located at absorption pot bottom
9h.Temperature transmitter interface 9e, temperature transmitter interface 9f, temperature transmitter interface 9g install temperature transmitter respectively.Absorption
Activated carbon is loaded in tank 9 and forms active carbon bed 27, and cooling coil 25 is set, cooling coil 25 intersects at cold with adsorption tanks 9
Liquid import 9c and cold liquid outlet 9d.Cold liquid inlet 9c is located at the top sidewall of adsorption tanks 9, is connected, returns with returning the outlet conduit of liquid pump 34
The import of liquid pump 34 is connected by pipeline with knockout drum liquid outlet 2g.Cold liquid in knockout drum 2 can be by returning liquid pump
34 pressurizations enter the cooling coil 25 of adsorption tanks 9, and cooling coil 25 has 4 kinds of forms, as shown in Figure 6.Cooling coil 25 is stainless
Steel material is made.After cold liquid enters cooling coil 25, play a part of cooling to active carbon bed, meanwhile, cold liquid temperature degree obtains
Improve, the cold liquid of temperature recovery, also the conveying beneficial to long range and reuse.Leave the temperature of cooling coil 25 in adsorption tanks 9
Cold liquid after degree rise, liquid state organics feed-line 13 is converged into returning the outlet conduit of liquid pump 34.
The connection of adsorption tanks 10 is similar with adsorption tanks 9.Adsorption tanks 10 include eight external interfaces：Gas feed 10a,
Gas vent 10b, cold liquid inlet 10c, cold liquid outlet 10d, temperature transmitter interface 10e, temperature transmitter interface 10f, temperature
The transmitter interface 10g and tap hole 10h for being located at adsorption tanks 10.Temperature transmitter interface 10e, temperature transmitter interface 10f,
Temperature transmitter interface 10g installs temperature transmitter respectively.Activated carbon is loaded in adsorption tanks 10 and forms active carbon bed 28, and is set
The cooling coil 26 of smooth surface is put, both ends and the adsorption tanks 10 of cooling coil 26 intersect at cold liquid inlet 10c and cold liquid outlet 10d.
Cold liquid inlet 10c is located at the top sidewall of adsorption tanks 10, is connected with returning the outlet conduit of liquid pump 34.Cold liquid in knockout drum 2 can
Enter adsorption tanks cooling coil 26 by returning the pressurization of liquid pump 34.After cold liquid enters cooling coil 26, play and active carbon bed is dropped
The effect of temperature, meanwhile, cold liquid temperature degree is improved, the cold liquid of temperature recovery, also the conveying beneficial to long range and is reused.From
The cold liquid after the temperature recovery of cooling coil 26 in adsorption tanks 10 is opened, it is defeated to converge into liquid state organics with time outlet conduit of liquid pump 34
Send pipeline 13.
In this embodiment, assisted desorption system is also accessed in adsorption tanks 9 and the top of adsorption tanks 10, and assisted desorption system is inhaled two
Gas stripping gas inlet valve 21 and gas stripping gas inlet valve 22 are respectively equipped with before attached tank to control the supply of heat transferring medium, and heat exchange used is situated between
Matter is any one of nitrogen or vapor, enters adsorption tanks by assist medium pipeline 12.Such as desorbed using vapor auxiliary,
Adsorption tanks 9 and the bottom of adsorption tanks 10 set adsorption tanks tap hole 29 and adsorption tanks tap hole 30 to discharge vapor formation respectively
Condensed water, as shown in Figure 5.
In the present embodiment, after returning liquid pump 34, before cold liquid inlet valve 23, the parallel line of cold liquid inlet valve 24, provided with cold
Liquid temperature transmitter 35, after cold liquid inlet valve 23, the parallel line of cold liquid inlet valve 24, conflux with liquid state organics multi-purpose station pipeline
The pipeline of rear end is provided with cold liquid temperature transmitter 14 after heat exchange, for monitoring the front and rear cold liquid temperature degree of heat exchange, can pass through control
Refrigerating fluid flow control valve（Switch valve）36 aperture, cold liquid temperature degree after regulation heat exchange, to reach suitable outer defeated and reuse temperature
Degree.
In the present embodiment, emergency blow-down valve 15 is additionally provided with, in case being used during the state of emergency.
Programmable control system is separately set in device（PLC）, all pump motors, the unlatching of automatic valve, closed mode are equal
Transmit to PLC, each valve opening is worked out in PLC and closes logic control program.
Embodiment 2：
The VOCs emission control systems of integrated condensing and absorption based on embodiment 1, its processing method comprise the following steps：
（1）Gas from oil gas collection pipeline 11 is from side input lime set collecting tank 1, and on-condensible gas is discharged from top, oil gas
Droplet and Yi Ning the components sedimentation separation in lime set collecting tank 1 of middle entrainment, after collecting pot bottom discharge, inputted through pipeline
Knockout drum 2.The on-condensible gas of the top of lime set collecting tank 1 discharge, pressurizes through blower fan 4 and is sent into ice chest 5.After heat exchange cools down,
It is condensed into the component input knockout drum 2 of liquid.
（2）The on-condensible gas discharged from ice chest 5 enters adsorption tanks 9 or adsorption tanks 10, adsorption tanks 9 and adsorption tanks 10 through pipeline
Alternately parallel running, when adsorption tanks 9 are in adsorbed state, adsorption tanks 10 are then in desorption state, when adsorption tanks 9 are in desorption
During state, adsorption tanks 10 are in adsorbed state.The state of two adsorption tanks, passes through Valve controlling.
Illustrate its operation by taking adsorption tanks 9 as an example.
When adsorption tanks 9 are in adsorbed state, adsorption tanks inlet valve 7 is opened, adsorption tanks outlet valve 17 is opened, vacuum desorption valve 32
Close.Gas from the gas vent 5b of ice chest 5 enters adsorption tanks 9 by adsorption tanks inlet valve 7, in the selective absorption of activated carbon
Under effect, part VOCs components are tightly held by activated carbon, and tail gas goes discharge drum 16 to be vented by adsorption tanks outlet valve 17.
During using activated carbon as adsorbent, bed temperature is no more than 65 DEG C, but because adsorption process is a heat release
Journey, particularly some heats of adsorption are larger, or when activated carbon has catalytic action to some components, heat of adsorption is with regard to particularly significant, meeting
Cause local bed temperature too high（More than 80 DEG C）, locally even there is situation about catching fire, this safety operation for adsorption tanks
It is totally unfavorable.Therefore, take suitable means to be controlled bed temperature to be very important.
Specifically, the side different height of adsorption tanks 9 is provided with three temperature transmitters, to monitor the bed of different height
Temperature.Further, since the condensate temperature from ice chest 5 is very low, cooling coil 25 is pumped to by returning the pressurization of liquid pump 34, is cooled down
Coil pipe 25 is arranged in active carbon bed, the active carbon bed close contact with different height, after cold liquid enters cooling coil 25,
Play a part of cooling to active carbon bed, meanwhile, cold liquid temperature degree is improved, the cold liquid of temperature recovery, is also beneficial to over long distances
Conveying and reuse.The cold liquid of the temperature recovery of cooling coil 25 is left, liquid is converged into returning the outlet conduit of liquid pump 34
Organic matter feed-line.
When the active carbon bed 27 in adsorption tanks 9 is adsorbed close to saturation, adsorption tanks 9 are transferred to desorption shape by adsorbed state
State, now adsorption tanks inlet valve 7 is closed, adsorption tanks outlet valve 17 is closed, vacuum desorption valve 31 is opened, and vavuum pump 33 starts, and is started to inhaling
Attached tank 9 is vacuumized, and with the progress vacuumized, the organic matter being originally attracted in active carbon bed is desorbed out,
The outlet of vavuum pump 33 is connected with the stripping gas import 2d on knockout drum 2 with pipeline, and stripping gas is sent into gas-liquid through vavuum pump 33
Knockout drum 2, easily solidifying component liquefaction therein enter gas-liquid separation tank bottom, are not easy solidifying component then from the gas at the top of knockout drum 2
Body outlet 2c discharges, gas vent 2c are connected through pipeline with the import of blower fan 4, and gas will carry out condensation process again.
Desorption is such as vacuumized organic matter can not all to be desorbed, can be by being passed through nitrogen or water steaming to active carbon bed
The mode assisted desorption of gas.During assisted desorption, gas stripping gas inlet valve 21 is opened, nitrogen or vapor be passed through adsorption tanks 9 aid in into
Row desorption.Such as using vapor auxiliary desorption, after the completion of desorption, discharge what water vapor condensation was formed by adsorption tanks tap hole 29
Condensed water.
The desorption of adsorption tanks 9 is completed and then secondary carry out absorption process, adsorption tanks planted agent recover normal pressure shape from vacuum state
State, at this moment, adsorption tanks equalizer valve 19 are opened, and air enters adsorption tanks 9 from adsorption tanks equalizer valve 19, recover atmospheric pressure state, are prepared
Absorption again.
The running situation of adsorption tanks 10 is consistent with adsorption tanks 9, the two alternate run.
Return liquid and the operation of cold liquid cooling system is as follows：From lime set collecting tank 1, ice chest 5, vavuum pump 33 drop in gas-liquid
It is enriched with knockout drum 2, forms certain liquid layer, when liquid layer reaches certain liquid level, the liquid level signal output of fluid level transmitter 3, is returned
Liquid pump 34 starts.Now, such as it is not required to cool down adsorption tanks 9 and adsorption tanks 10, then cold liquid inlet valve 23 and condensation import
Valve 24 is in closed mode, cold liquid stream adjustable valve（Switch valve）36 open, and return liquid pump 34 and directly pump liquid state organics
To corresponding storage tank.Such as need to cool down adsorption tanks 9, then cold liquid inlet valve 23 is opened, and condensation inlet valve 24 is closed, cold liquid stream
Adjustable valve（Switch valve）36 close, and the cooling coil 25 that liquid pump 34 delivers to condenser pump inside adsorption tanks 9 are returned, to active-carbon bed
Layer 27 is cooled down.The cold liquid of adsorption tanks 9 is left through pipeline to cold liquid stream adjustable valve（Switch valve）36 downstream lines, through liquid
Organic matter line 13 is delivered to corresponding storage tank.Cold liquid is consistent with adsorption tanks 9 in the running status of adsorption tanks 10.Cold liquid removes cooler pan
Pipe branch road front end and cold liquid conflux with liquid state organics multi-purpose station pipeline rear end pipeline on be respectively arranged with cold liquid temperature transmitter
35 and heat exchange after cold liquid temperature transmitter 14, can be by controlling cold flow quantity to adjust for monitoring the front and rear cold liquid temperature degree of heat exchange
Save valve（Switch valve）36 aperture, cold liquid temperature degree after regulation heat exchange, to reach suitable outer defeated and reuse temperature.
The protection content of the present invention is not limited to above example.Under the spirit and scope without departing substantially from inventive concept, this
Art personnel it is conceivable that change and advantage be all included in the present invention, and using appended claim as protection
Scope.
Claims (10)
1. a kind of integrated condensing and the VOCs emission control systems of absorption, it is characterised in that including primary heat exchange system, Yi Jiyu
Primary heat exchange system pipeline connects successively condenser system and adsorption system, the primary heat exchange system and condenser system also pass through
Pipeline accesses knockout drum, and the condenser system includes ice chest and refrigeration unit, the refrigeration unit by refrigeration piping and
Ice chest forms refrigerating circuit, and the ice chest top or top sidewall are provided with gas vent, and the gas vent is accessed by pipeline
Adsorption system, the cooling that the adsorption system includes the adsorption tanks of built-in active carbon bed and cooled to active carbon bed
Device, the cooling device use cooling tube, and cooling tube one end is connected by pipeline with knockout drum, and the other end has with liquid
Machine thing feed-line connects, and the liquid state organics feed-line front end is knockout drum, and the knockout drum also passes through
Vavuum pump is connected with adsorption tanks pipeline.
2. integrated condensing according to claim 1 and the VOCs emission control systems of absorption, it is characterised in that the cooling
Manage as two dimensional surface cooling tube or three-dimensional spiral cooling coil, directly contacted with active carbon bed in adsorption tanks；Cooling tube is light
Facial canal, screwed pipe or finned tube.
3. integrated condensing according to claim 1 or 2 and the VOCs emission control systems of absorption, it is characterised in that described
Cooling tube material is any one or more of carbon steel, stainless steel, copper or aluminium.
4. integrated condensing according to claim 1 and the VOCs emission control systems of absorption, it is characterised in that the absorption
Nested design is set, every group of two adsorption tanks for being provided with adsorption-desorption alternate run.
5. integrated condensing according to claim 4 and the VOCs emission control systems of absorption, it is characterised in that the absorption
Pot bottom is equipped with adsorption tanks inlet valve, vacuum desorption valve, and top is equipped with adsorption tanks outlet valve, and adsorption tanks outlet valve simultaneously couples
Enter waste gas discharge drum.
6. integrated condensing according to claim 1 and the VOCs emission control systems of absorption, it is characterised in that the absorption
Tank is also connected with assisted desorption system pipeline, and heat transferring medium used is any of nitrogen or vapor in the assisted desorption system
It is a kind of.
7. integrated condensing according to claim 1 and the VOCs emission control systems of absorption, it is characterised in that the primary
Heat-exchange system is primary air-cooled heat exchanger or lime set collecting tank.
8. integrated condensing according to claim 1 and the VOCs emission control systems of absorption, it is characterised in that the gas-liquid
Liquid pump is provided with back after knockout drum, liquid pump is returned and is connected respectively with adsorption tanks, liquid state organics feed-line.
9. integrated condensing according to claim 1 and the VOCs emission control systems of absorption, it is characterised in that the gas-liquid
Fluid level transmitter is additionally provided with knockout drum, temperature transmitter is additionally provided with the adsorption tanks, the vavuum pump is dry vacuum pump.
10. the processing method of integrated condensing as claimed in claim 1 and the VOCs emission control systems of absorption, its feature exist
In comprising the following steps：
（1）Oil gas enters primary heat exchange system through pipeline, enters condenser system after pre- recovery in primary heat exchange system, is condensing
Realize that partial organic substances liquefy in system, liquid phase stores into knockout drum, and gas phase enters adsorption system；
（2）Active carbon bed adsorbs organic matter, and the low temperature organic liquid in knockout drum enters cooling coil by pipeline, right
Adsorption bed is cooled in adsorption tanks；When active carbon bed is close to saturation, cooling coil valve is closed, adsorption tanks are by adsorbing
State switchs to detachment status, vacuum pump startup, the active carbon bed in adsorption tanks is desorbed；
（3）After desorption, VOCs enters knockout drum, wherein easily solidifying component enters gas-liquid separation tank bottom and forms liquid layer, fixed gas
Body accesses condenser system through pipeline, carries out condensation process again.
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